case snerio, Database Management System

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each publisher has uniqe name a mial addrs are also kept on each pubisher.a publisher publish one book.a book publish y one publisher.book identified by isbn.each book writn by one nd more auther an authr write one book potentaily 4 diffrnt publisher.each authr paid a crtn royality rat on each book witch potntaily diffr 4 each booknd authr/an authr recieve sperat check

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